WO2007114052A1

WO2007114052A1 - Core for transmission belt, and transmission belt

Info

Publication number: WO2007114052A1
Application number: PCT/JP2007/055748
Authority: WO
Inventors: Kimichika Ohno
Original assignee: Bando Chemical Industries, Ltd.
Priority date: 2006-04-05
Filing date: 2007-03-20
Publication date: 2007-10-11
Also published as: US20100105510A1; EP2009323A1; CN101460764B; EP2009323A4; JPWO2007114052A1; CN101460764A

Abstract

A core for a transmission belt capable of substantially suppressing the occurrence of noise by adding a sufficient performance to the drive belt when it is used in the drive belt. A drive belt which can effect a sufficient performance when it is used, and in which the occurrence of noise can be substantially suppressed.

Description

Specification

Transmission belt core wire and transmission belt technology

The present invention relates to a transmission belt core wire and a transmission belt.

Background art

[0002] Currently, a transmission belt is used to transmit power from a drive source to an auxiliary machine. However, when power is transmitted from the drive source to the auxiliary equipment, noise may be generated due to the transmission belt.

[0003] For example, in the driving of auxiliary equipment for automobiles, a serpentine drive system is often employed in which an auto tensioner is used and the torque on each auxiliary equipment is driven by a single V-ribbed belt. However, in the serpentine drive system, the drive-side torque and the accessory-side torque will resonate and the swing of the auto tensioner will become very large, and the belt on the tension pulley of the auto tensioner will Noises such as tapping may occur.

[0004] On the other hand, an attempt was made to reduce the amount of oscillation of the auto tensioner by setting the life span of the canopy to 19600 to 100000N per rib, following the V-ribbed borer. (See Patent Document 1). Patent Document 1 discloses using aramid fiber, polyvinyl alcohol fiber, or polyethylene naphthalate fiber instead of the polyethylene terephthalate fiber that has been generally used as a material for the core wire. .

[0005] However, when polybulu alcohol fiber is used, wet heat degradation occurs when it is exposed to steam during vulcanization. Therefore, it is necessary to study a production method that can completely shut out steam. It has proven difficult to mass produce. In addition, polyethylene naphthalate fiber and aromatic polyamide fiber are less adhesive than polyethylene terephthalate fiber, and there is a drawback that the core wire may pop up when repeatedly subjected to extreme bending. .

[0006] Thus, the conventional transmission belt maintains sufficient performance for use and has sufficient noise. There is a drawback that it cannot be suppressed.

Patent Document 1: Japanese Patent Laid-Open No. 2001-248692

Disclosure of the invention

Problems to be solved by the invention

[0007] The present invention has been made in view of the above-mentioned conventional drawbacks. When used in a transmission belt, the present invention provides the transmission belt with sufficient performance (for example, durability), and For example, when used as a core wire such as a V-ribbed belt, the swing amount is substantially reduced, sufficient performance (for example, durability) is provided, and noise generation is substantially reduced. It is an object to provide a transmission belt core wire that achieves at least one of restraining and the like. In addition, the present invention exhibits sufficient performance (for example, durability, etc.) for use, and when used as, for example, a V-ribbed belt, the swing amount is substantially reduced, which is sufficient for use. It is an object of the present invention to provide a transmission belt that achieves at least one of exhibiting excellent performance (for example, durability, etc.) and substantially suppressing noise generation. Other problems of the present invention are apparent from the description of the present specification.

Means for solving the problem

[0008] The present invention has been made in view of the above problems, and relates to a core wire for a transmission belt characterized by containing polyketone fibers. The present invention also relates to a transmission belt, wherein the transmission belt core wire is embedded.

The invention's effect

[0009] According to the transmission belt core wire of the present invention, when used in a transmission belt, the transmission belt is provided with sufficient performance (for example, durability, etc.) for use, and for example, a V-ribbed belt. When used as a core wire, etc., the swing amount is substantially reduced, sufficient performance (for example, durability) is provided, and noise generation is substantially suppressed, etc. It has an excellent effect of achieving at least one of the following. Further, according to the transmission belt of the present invention, the performance sufficient for use (for example, durability, etc.) is exhibited and, for example, when used as a V-ribbed belt, the swing amount is substantially reduced. , Providing sufficient performance for use (for example, durability) and substantially suppressing noise generation It has an excellent effect that at least one of the above can be achieved.

Brief Description of Drawings

[0010] FIG. 1 is a cross-sectional view of a V-ribbed belt as an example of a transmission belt, and shows a view perpendicular to the longitudinal direction of the belt.

FIG. 2 is a schematic view of a multi-axis transmission device.

FIG. 3 is a schematic view of a multi-axis transmission device.

FIG. 4 is a schematic diagram showing a core wire and a monofilament. In the figure, the broken line A shows the center line, and the solid line B shows the center line of the minimum twist unit. In the figure, the thick vertical line indicates the core.

Explanation of symbols

1 Top canvas layer

2 core wire

3 Adhesive rubber layer

4 Rib rubber layer

5 ribs

6 Drive pulley

7 idler pulley

8 Air conditioner pulley

9 Power steering pulley

10 Water pump pulley

11 Alternator pulley

12 Auto tensioner

13 Tension pulley

14 Driven pulley

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] In one aspect, the present invention relates to a core wire for a transmission belt containing polyketone fibers.

[0013] The core wire for the transmission belt of the present invention contains polyketone fiber, which is one major feature. There are signs. Therefore, when the core wire for a transmission belt according to the present invention is used as a core wire for a transmission belt, for example, a V-ribbed belt, it is possible to substantially suppress the generation of noise due to resonance caused by the transmission belt.

[0014] Further, when the core wire for a transmission belt of the present invention is used as a core wire for a transmission belt, for example, a V-ribbed belt, it exhibits excellent adhesion to a rubber composition. Even when repeated bending is repeated, pop-out of the transmission belt core wire can be substantially suppressed. Further, according to the core wire for a transmission belt of the present invention, since the polyketone fiber is contained, an excellent effect that the influence on wet heat at the time of vulcanization can be substantially suppressed is exhibited.

[0015] In the core wire for a transmission belt of the present invention, the inclination angle of the polyketone fiber monofilament is preferably 8 ° or more with respect to the longitudinal axis of the polyketone fiber from the viewpoint of bending fatigue. From the standpoint of elongation during belt travel, which is more preferred above 24. It is preferable that the angle is 20 ° or less. According to the core wire for the power transmission belt, when used in the manufacture of the power transmission belt, the power transmission belt can exhibit excellent durability, and the generation of abnormal noise due to the power transmission belt can be substantially suppressed. You can.

[0016] In the present specification, the inclination angle ( _α ) means the center line of the core in the belt circumferential direction (broken line in FIG. 4) and the center line of the minimum twist unit (solid line of B in FIG. 4). Observation direction of the core line intersecting with

The angle (°) between the monofilaments on the surface (see Fig. 4), equation (1):

[0017] [Equation 1]

«= | 90-+ 90-0 I I (1)

[In the formula (1), β is the angle of the line in the diameter direction of the monofilament twist yarn, and the formula (2): [0019] [Equation 2]

[0020] [In the formula (2), T is the number of times of twisting (times / 10cm), D is the total fineness of the twisted yarn (denier) E), s indicates specific gravity]

Angle obtained by, i.e., in terms of the formula (2 _'):

[0021] [Equation 3] (2,)

[In the formula (2 ′), T 1 is the number of times of lower twist (times / 10 cm), D 1 is the total fineness of the lower twist yarn (dtex)

, S indicates specific gravity)

Θ is the angle with respect to the upper twist diameter direction line of the lower twist yarn, and the equation (3):

[0023] [Equation 4]

^ _θ- ^ μ = (3)

[In Formula (3), T 2 is the number of times of lower twist (times / 10 cm), D 2 is the total fineness (denier) of the lower twist, and s is the specific gravity]

The angle calculated by the equation (ie, the equation (3 ′) when converted):

[0025] [ _Equation 5] i _ane (3,)

[In formula (3 ′), T 2 is the number of times of twisting (times / 10 cm), D 2 is the total fineness of the twisted yarn (dtex)

, S indicates specific gravity)

It is an angle calculated by

Is an angle calculated by.

[0027] When the twist direction of the lower twist and the upper twist is the same direction, such as Lang twist, in the formula (1), with respect to the value of j3 calculated by the formula (2), The value with a negative sign is used as β. Also, when the core wire is formed by only one twist, such as single twist, / 3 = 0, and the formula (4):

[0028] [Equation 6] α = 90-θ (4) [In formula (4), Θ is the same as above]

Is calculated by

[0030] The polyketone compound used in the polyketone fiber is not particularly limited. For example, 90% by weight or more of the repeating units are represented by the following formula (I):

[0031] [Chemical 1]

-^ CH ₂ CH ₂ CO ^-(I)

[0032] Polyketones composed of 1-oxotrimethylene units represented by In the present invention, the transmission belt, for example, the ability to suppress abnormal noise when embedded as a core wire of the transmission belt, the adhesion to the rubber composition, and the ability to suppress moisture and heat deterioration are fully expressed in the transmission belt. From the viewpoint of making it preferable, the polyketone composed of the 1-oxotrimethylene unit force is preferable. The “polyketone composed of 1-oxotrimethylene units in which 90% by weight or more of the repeating units are represented by the above formula (I)” is, in other words, 1-oxotrimethylene monomer power to be polymerized. It can be regarded as a product obtained by carrying out a polymerization reaction so as to be 90% by weight or more.

[0033] The core wire for the transmission belt of the present invention preferably has a filament strength of the polyketone fiber.

[0034] As a method for producing the polyketone fiber, specifically,

(A) producing a filament made of a polyketone compound, and

(B) A step of twisting the filament obtained in the step (B)

And the like.

[0035] In the step (A), the monofilament composed of the polyketone compound is not particularly limited, and can be produced, for example, by a wet spinning method, a dry spinning method, or the like. The wet spinning method is a method in which a polyketone compound-containing solution is discharged from a spinneret into a coagulation bath, and the resulting product is dried and hot drawn. The dry spinning method is a method in which the polyketone compound-containing solution is dried. In this method, the liquid component contained in the product discharged from the spinneret and discharged in a high-temperature atmosphere is volatilized and hot stretched.

[0036] The polyketone compound-containing solution contains the polyketone compound, for example, a halogenated suboxide. It is a solution obtained by dissolving in a lead compound-containing aqueous solution, hexafluoroisopropanol, m-cresol, resorcin, zinc aqueous solution or the like.

[0037] The fiber length of the monofilament is preferably 10 mm or more from the viewpoint of taking advantage of the strength of the fiber. In addition, the diameter of the monofilament is from the viewpoint of easy spinning,

Desired to be between 3 μm and 40 μm.

[0038] In the step (B), a monofilament composed of the polyketone compound is, for example,

In addition, by twisting a combination of the lower twist and the upper twist, the inclination angle in the above range is obtained.

[0039] In the present invention, the total fineness of the polyketone fiber should be in a range according to the purpose of use. The total fineness is preferably not less than 200 Odtex, more preferably not less than 3000 dtex, and more preferably not more than 12,000 dtex, and more preferably not more than 7000 dtex from the viewpoint of suppressing bending fatigue. .

[0040] Specifically, for example, the monofilament made of a polyketone composed of the 1-year-old xisotrimethylene unit is obtained by polymerizing ethylene and carbon monoxide in a dilute solvent in the presence of a radical initiator. To obtain a polyketone in which 90% by weight or more of the repeating units are units of 1-oxotrimethylene, and then dissolve the polyketone in an aqueous solution containing a halogenated zinc compound or the like to obtain a polyketone-containing solution. The product is discharged into a coagulation bath, and the resulting product is dried and hot drawn (wet spinning method); the polyketone-containing solution is discharged from a spinneret and contained in the product discharged in a high-temperature atmosphere. It can be obtained by volatilizing the liquid component and hot drawing (dry spinning method). Subsequently, polyketone fibers are obtained by twisting the monofilament so as to have an inclination angle force of 8 ° to 24 ° with respect to the longitudinal axis.

[0041] In the production method, (C) a step of immersing the polyketone fiber obtained in the step (B) in a solution (first treatment liquid) containing an isocyanate H-hybrid compound or an epoxy compound. D) drying the product obtained in the step (C) by passing it through an oven adjusted to 180 ° C to 280 ° C for 30 seconds to 2 minutes;

(E) The fiber obtained in the step (D) is mixed with RFL [initial condensate of resorenosin and formalin and latex (for example, styrene 'butadiene' bullpyridine copolymer, black mouth plane, etc. )] Step of immersing in solution (second treatment liquid), and

(F) a step of drying the product obtained in the step (E) through an oven adjusted to 180 ° C to 280 ° C for 30 seconds to 2 minutes,

You can do more. By performing these steps, excellent adhesion to the rubber component used in the obtained fiber force transmission belt is exhibited.

[0042] The isocyanate compound is not particularly limited, and examples thereof include 4,4'-diphenylmethane diisocyanate, p_phenyldiisocyanate, polymethylene polyphenyl polyisocyanate, and the like. Can be mentioned. Examples of the epoxy compound include polyhydric alcohols (eg, ethylene glycol, glycerin, pentaerythritol, sorbitol, etc.), polyalkylene glycols (eg, polyethylene glycol, etc.), and halogen-containing epoxy compounds (eg, epichlore). Reaction products with hydrins, etc .; reaction products of polyhydric phenol compounds (eg bis (4-hydroxyphenyl) dimethylethane, phenol formaldehyde resins, resorcin formaldehyde resins, etc.) with halogen-containing epoxy compounds Etc. The solution containing the isocyanate compound or epoxy compound can be obtained by dissolving the isocyanate compound or epoxy compound in, for example, toluene.

[0043] In the above production method, the amount of adhesive may be stabilized by repeating the step (E) 2 to 3 times.

[0044] Further, in the manufacturing method, the viewpoint of sufficiently exerting the adhesiveness of the core wire to the rubber component or the like used in the transmission belt, the viewpoint power to improve the tackiness with the rubber at the time of manufacturing the belt, (F) When the product obtained in the step (E) is a solution containing an epoxy compound (epoxy resin), a phenol compound (phenol resin) or the like, or an adhesive rubber composition It may be further immersed in a solution dissolved in a solvent and dried.

In another aspect, the present invention relates to a transmission belt characterized in that the transmission belt core wire is embedded. Since the power transmission belt of the present invention is mounted on the power transmission belt of the present invention, the power transmission belt of the present invention exhibits sufficient performance (for example, durability) and is used as, for example, a V-ribbed belt. If this occurs, the amount of rocking will be substantially reduced and noise will be reduced. Can be substantially suppressed.

[0046] The transmission belt of the present invention can be used, for example, as a V-ribbed belt in the case of using an auto tensioner.

[0047] Examples of the transmission belt of the present invention include belts (V-ribbed belts, etc.), flat belts, toothed belts, and the like.

[0048] Hereinafter, the V-ribbed belt shown in Fig. 1 will be described as an example of the transmission belt of the present invention. Note that the transmission belt of the present invention is not limited to a powerful example.

[0049] The V-ribbed belt shown in FIG. 1 includes an adhesive rubber layer 3 having a rubber composition as a constituent member, an upper canvas layer 1 disposed on the upper surface side of the adhesive rubber layer 3, and the adhesive rubber layer 3 The upper surface canvas layer 1, the adhesive rubber layer 3, and the rib rubber layer 4 are integrally formed. On the bottom surface side of the rib rubber layer 4, three ribs 5 provided so as to extend in the belt length direction are formed at a predetermined pitch in the belt width direction. Further, in the central region of the adhesive rubber layer 3 in the belt thickness direction, a plurality of core wires 2 that extend in a substantially belt length direction and are spirally provided at a predetermined pitch in the belt width direction are arranged at regular intervals. It has been installed.

[0050] The adhesive rubber layer 3 is a layer made of a rubber composition. The rubber composition contains, for example, black-prene rubber, ethylene propylene rubber, hydrogenated nitrile rubber, alkyl chlorosulfonated polyethylene, etc. alone or as a mixture of two or more. As long as the rubber composition does not interfere with the object of the present invention, reinforcing agents such as short fibers and inorganic fillers described later, co-crosslinking agents, plasticizers, stabilizers, processing aids, and coloring agents. Etc. may be contained appropriately. The adhesive rubber layer 3 serves as a rubber layer that forms a belt main body and holds a plurality of core wires 4.

[0051] The upper surface canvas layer 1 is bonded to the upper surface of the belt by applying an adhesive treatment to a woven fabric such as nylon, cotton, etc., by dissolving the rubber in a solvent, and sticking to the upper surface of the belt. When it is urged to abut, it bears one end of power transmission.

[0052] Like the adhesive rubber layer 3, the rib rubber layer 4 is made of a rubber composition containing chloroprene rubber, ethylene propylene rubber, hydrogenated nitrile rubber, alkylsulfonated polyethylene or the like. The elastic rib rubber layer 4 has improved elastic modulus in the belt width direction. Short fibers such as nylon fiber, aramid fiber, cotton, and vinylon may be mixed so as to be oriented in the belt width direction. When the V-ribbed belt is strung against the pulley, the strong rib rubber layer 4 comes into contact with the pulley and becomes the main component of power transmission.

[0053] The adhesive rubber layer 3 and the upper canvas layer 1 can be replaced with a layer having the same composition as the rib rubber layer 4 and a corresponding thickness.

[0054] The V-ribbed belt shown in FIG. 1 can be manufactured as follows, for example. In other words, a cylindrical mold is covered with a canvas that has been subjected to adhesion treatment with rubber glue or the like, and a rubber sheet having a rubber composition force is wound on the canvas. The core wire for the transmission belt of the present invention is wound around the rubber sheet. A rubber sheet made of a rubber composition is rubbed onto the transmission belt core wire. Thereby, a laminated body is obtained. Next, the cylindrical mold holding the obtained cylindrical laminate is introduced into the vulcanizing can. Thereafter, pressurization is performed from outside with high-pressure steam, and the laminated body inside the vulcanizing can is heated to vulcanize and integrate to obtain a rubber cylinder. The outer peripheral surface of the obtained rubber cylindrical body is ground with a grindstone, thereby providing a plurality of protrusions extending in the circumferential direction and formed at a predetermined pitch in the cylindrical axis direction. Next, a transmission belt (V-ribbed belt) is obtained by cutting the rubber cylinder into a predetermined width with a width corresponding to the three protrusions.

Hereinafter, the present invention will be described in detail with reference to examples and the like, but the present invention is not limited to such examples.

Example

[Example 1]

(Manufacture of core wire for transmission belt)

l Two multifilaments of polyketone fiber (made by Asahi Kasei Fibers Co., Ltd., trade name: Cyvalon ™, strength: 18cN / dtex, elongation: 6%, tensile elasticity: 335cNZdtex) bundled in lOOdtex Twisting was applied a predetermined number of times, and three of them were bundled and subjected to top twisting to obtain a core angle (1100 dtex / 2 X 3) with a filament angle (inclination angle (h)) of 5 ° and a total of 6600 dtex. The obtained core wire was immersed in a 20% by volume toluene solution of isocyanate (Sumidure 44V20, manufactured by Sumika Bayer Urethane Co., Ltd.) and then pre-treated by heating and drying at 240 ° C for 40 seconds. The cord is resorcinol formalin latex (RFL) solution Soaked in Zorcine (Sumitomo Chemical Co., Ltd.), formalin (Guangei Chemical Industry Co., Ltd.), Latex (CR Latex) (Showa Denko Co., Ltd.)] gave.

[0057] The filament angle [inclination angle (h)] is an angle (°) determined by the equation (1).

[Example 2]

(Manufacture of transmission belt)

A cylindrical mold having a circumferential length of 1000 mm was subjected to an adhesive treatment using an RFL solution, and a cotton / polyester blended canvas subjected to a pasting treatment was covered in a biased shape. On the canvas, an ethylene / propylene / gen rubber composition (manufactured by Sumitomo Chemical Co., Ltd., trade name: Esprene 30) was wound. The core wire obtained in Example 1 was beaten on the strong first adhesive rubber sheet.

[0059] Further, a second adhesive rubber sheet made of an ethylene-propylene-gen rubber composition was wound on the core wire. The thus obtained cylindrical mold obtained, placed in a vulcanizer, the inner pressure 588kPa (6kgf / cm ^2), the external pressure ^{883kPa (9kgf / cm 2),} 165. C. Sulfurized under conditions of 35 minutes to obtain a rubber cylinder.

[0060] The outer peripheral surface of the obtained rubber cylindrical body was ground with a grindstone, thereby providing a plurality of protrusions (shape: PK shape) extending in the circumferential direction and formed at a predetermined pitch in the cylinder axis direction. . Next, a transmission belt (V-ribbed belt) was obtained by cutting the rubber cylinder into a ring with a width corresponding to the three protrusions. The resulting belt had a total belt thickness of 4.3 mm and a rib height of 2. Omm.

[0061] (Comparative Example 1)

In the same manner as in Example 1, a polyethylene terephthalate core (lOOdtexZ 2 X 3) was produced. A transmission belt (V-ribbed belt) was obtained in the same manner as in Example 2 using the obtained core wire.

[0062] (Comparative Example 2)

In the same manner as in Example 1, a polyethylene naphthalate core wire (1100 dtex Z2 X 3) was produced. Using the obtained core wire, a transmission belt (V Ribbed belt) was obtained.

[0063] (Test Example 1)

Using each of the V-ribbed belts of Example 1, Comparative Example 1 and Comparative Example 2 as the transmission belts of the multi-axis transmission device shown in FIG. 2, the multi-axis transmission device was operated at room temperature (25 ° C). The amount of swing of the auto tensioner 12 was measured. The pulley diameter of alternator pulley 11 in Fig. 2 is 55 mm, this load is 1103 W, pulley diameter of air conditioner pulley 8 is 95 mm, this load is 809 W, power steering pulley 9 pulley diameter is 115 mm, and this load is 588 W. In addition, the water pump pulley 10 has a pulley diameter of 115 mm and a load of 37 W. The idler pulley 7 has a pulley diameter of 90 mm, the tension pulley 13 has a pulley diameter of 70 mm, its arm length is 75 mm, the tension applied to the belt is 147 N, and the drive pulley 6 has a pulley diameter of 120 mm and its rotational speed. Was 1000 rpm, and the drive shaft rotation fluctuation rate was ± 10%. The results are shown in Table 1.

[0064] [Table 1]

As a result, as shown in Table 1, according to the V-ribbed belt of Example 1 in which the core wire made of polyketone fiber was embedded, the core wire made of polyethylene terephthalate or the core wire made of polyethylene naphthalate was embedded. Compared with the V-ribbed belts of Comparative Examples 1 and 2, it can be seen that the swing amount of the auto tensioner is surprisingly low.

[0066] (Test Example 2)

(1) Experiment number 1

A polyketone fiber with a core of 1650dtex / l X 3 and a filament angle of 8 ° (Asahi Kasei Fibers Co., Ltd., trade name: Cyvalon ™, strength: 18cN / dte _X , elongation: 6%, tensile elasticity: 33 5cN / dt _ex ], a cord was obtained by the same operation as in Example 1, and then a V-ribbed belt was obtained by the same operation as in Example 2.

[0067] (2) Experiment number 2 A polyketone fiber with a core wire of 1650 dtex / l X 3 and a filament angle of 24 ° [made by Asahi Kasei Fibers Co., Ltd., trade name: Cyvalon ™, strength: 18 cN / dt _ex , elongation: 6%, tensile elasticity: 335 cN / A cord was obtained by the same operation as in Example 1 except that dtex], and then a V-ribbed belt was obtained by the same operation as in Example 2.

[0068] (3) Experiment number 3

A polyketone fiber with a core of 1650dtex / l X 3 and a filament angle of 5 ° (Asahi Kasei Fibers Co., Ltd., trade name: Cyvalon ™, strength: 18cN / dte _X , elongation: 6%, tensile elasticity: 33 5cN / dtex], a core wire was obtained by the same operation as in Example 1, and then a V-ribbed belt was obtained by the same operation as in Example 2.

[0069] (4) Experiment number 4

A polyketone fiber with a core wire of 1650 dtex / l X 3 and a filament angle of 26 ° [Asahi Kasei Fibers Corporation, trade name: Cyvalon ™, strength: 18 cN / dte _X , elongation: 6%, tensile elasticity: 335 cN / A cord was obtained by the same operation as in Example 1 except that dtex], and then a V-ribbed belt was obtained by the same operation as in Example 2.

[0070] (5) Experiment number 5

The core wire was the same as in Example 2 except that the core wire was made of polyethylene naphthalate (trade name: Type Q904M, manufactured by Teijin Techno Products Co., Ltd.) with 1100dtex / 2 X 3 and filament angle of 5 °. A V-ribbed belt was obtained.

[0071] (6) Experiment number 6

The core is the same as in Example 2 except that the core is made of aromatic polyamide (trade name: Technora, manufactured by Teijin Techno Products Co., Ltd.) with 1650 dtex / l X 3 and filament angle of 5 °. By operation, a V-ribbed belt was obtained.

[0072] (7) Experiment number 7

Except that the core wire is a core wire made of polybulal alcohol (trade name: manufactured by Kuraray Co., Ltd., trade name: Claron) with 1100 dtex / 2 X 3 and a filament angle of 5 °, the same operation as in Example 2 was performed. A V-ribbed belt was obtained.

[0073] (8) Evaluation of V-ribbed belt

Each of the V-ribbed belts of Experiment Nos. 1 to 7 is connected to the drive pulley 6 (direct It was attached to a belt drive system with a force of 120 mm (diameter), driven pulley 14 (diameter 120 mm), idler pulley 7 (diameter 70 mm) and tension pulley 13 (diameter 55 mm) arranged between these pulleys. The idler pulley 7 was engaged with the back of the belt. Under an ambient temperature of 110 ° C, the load of the driven pulley 14 is set to 11.9 kw (16 horsepower), the initial tension of the tension pulley 13 is set to 833 N (85 kgf), and the drive pulley 6 is driven at a rotational speed of 4900 rpm. The belt was run. In addition, the tensile strength of the belt before and after running was measured, and the strength maintenance rate (strength after running Z before running) was determined. The results are shown in Table 2.

[¾2]

As a result, in the case of a V-ribbed belt in which a core made of polyketone fiber is embedded, noise is suppressed, and in particular, as in the V-ribbed belts of Experiment Nos. 1 and 2, the filament angle is 8 ° to 24 °. the V-ribbed belt core wires are embedded consisting of polyketone fibers is, filament angle 5 ° or compared to 26 ° of the polyketone fiber strength becomes cord, this and the force ^s Wachikararu also excellent in durability.

Industrial applicability

[0076] According to the transmission belt core wire and the transmission belt of the present invention, it is possible to provide means capable of suppressing noise and maintaining, for example, a state suitable for use of a drive source, an auxiliary machine, and the like. .

Claims

The scope of the claims

A core wire for a transmission belt, comprising polyketone fiber.

Inclination angular force of the monofilament of the polyketone fiber 8-24 with respect to the longitudinal axis of the core wire

The core wire for a transmission belt according to claim 1, wherein:

A power transmission belt, wherein the power cable core wire according to claim 1 or 2 is embedded.

The power transmission belt according to claim 3, which is a V-ribbed belt.